First introduced by Balanced Audio Technology in the '90's, this Russian military tube had never been seen in the west. BAT called it the "Super Tube" and for good reason. It comes in a small package but due to it's low impedance one 6H30 tube can drive a signal more efficiently than several more common tubes in it's place. So where two or more 6922 tubes were used, one 6H30 could now do the job. Now this tube fairly common and found in reference level gear by Audio Research, Ayon, and Conrad Johnson to name only a few.
Because it's considered very modern there are not many brands to choose from. We offer the Sovtek and Electro Harmonix tubes, both in current production. Occasionally we manage to find some NOS 6H30p-DR tubes, which most audiophiles consider to be the best option.